Load Specifications
Load data in caliber .300 HAM'R with .308 | 130gr | Speer Hot-Cor bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 36, Accurate 1680 and IMR 4227.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 96% | 50,256 psi | 87% | 2182 fps | 98.5% |
| Accurate 5744 | <<locked>> | 82% | 50,546 psi | 88% | 2198 fps | 99.2% |
| Accurate No. 11 FS | <<locked>> | 84% | 49,516 psi | 86% | 2162 fps | 100% |
| ADI AR 2205 | <<locked>> | 88% | 50,444 psi | 88% | 2100 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 46,586 psi | 81% | 2211 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 36,912 psi | 64% | 2087 fps | 96% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 48,515 psi | 84% | 2205 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 27,064 psi | 47% | 1286 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 41,989 psi | 73% | 2116 fps | 98.1% |
| IMR 4227 | <<locked>> | 94% | 49,922 psi | 87% | 2175 fps | 99.9% |
| Lovex D060 | <<locked>> | 88% | 51,256 psi | 89% | 2208 fps | 99.3% |
| Lovex D063 | <<locked>> | 84% | 51,082 psi | 89% | 2195 fps | 99.3% |
| Lovex S053 | <<locked>> | 96% | 49,588 psi | 86% | 2165 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 40,770 psi | 71% | 2149 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 25,831 psi | 45% | 1312 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 51,082 psi | 89% | 2228 fps | 99.9% |
| Shooters World Blackout | <<locked>> | 84% | 51,082 psi | 89% | 2195 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 88% | 51,256 psi | 89% | 2208 fps | 99.3% |
| Shooters World SOCOM | <<locked>> | 86% | 48,660 psi | 85% | 2152 fps | 99.4% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 50,386 psi | 88% | 2057 fps | 100% |
| Vihtavuori N110 | <<locked>> | 90% | 49,298 psi | 86% | 2103 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 47,065 psi | 82% | 2185 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 16"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | 21.9 gr | 88% | 37,391 psi | 65% | 2001 fps | 95.8% |
| Accurate 5744 | <<locked>> | 80% | 47,094 psi | 82% | 2149 fps | 98.8% |
| Accurate No. 11 FS | <<locked>> | 80% | 42,757 psi | 74% | 2070 fps | 99.9% |
| ADI AR 2205 | <<locked>> | 80% | 38,798 psi | 67% | 1949 fps | 100% |
| ADI AR 2207 | <<locked>> | 82% | 24,642 psi | 43% | 1821 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 98% | 34,113 psi | 59% | 2037 fps | 95% |
| Alliant Reloder-7 | <<locked>> | 90% | 34,301 psi | 60% | 1988 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 18,840 psi | 33% | 1138 fps | 100% |
| IMR 4198 | <<locked>> | 92% | 32,271 psi | 56% | 1946 fps | 95.2% |
| IMR 4227 | 17.4 gr | 80% | 31,053 psi | 54% | 1880 fps | 96.7% |
| Lovex D060 | <<locked>> | 80% | 39,610 psi | 69% | 2034 fps | 97.4% |
| Lovex D063 | <<locked>> | 80% | 44,135 psi | 77% | 2103 fps | 98.5% |
| Lovex S053 | <<locked>> | 80% | 29,631 psi | 52% | 1860 fps | 99% |
| Norma 200 | <<locked>> | 94% | 32,605 psi | 57% | 2008 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 17,434 psi | 30% | 1155 fps | 100% |
| ReloadSwiss RS 36 | 18.5 gr | 80% | 29,341 psi | 51% | 1883 fps | 95.8% |
| Shooters World Blackout | <<locked>> | 80% | 44,135 psi | 77% | 2103 fps | 98.5% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 39,610 psi | 69% | 2034 fps | 97.4% |
| Shooters World SOCOM | <<locked>> | 80% | 39,073 psi | 68% | 2014 fps | 97.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 27,876 psi | 48% | 1749 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 35,157 psi | 61% | 1919 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 23,221 psi | 40% | 1765 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 22 powders for .300 HAM'R loaded with the .308 | 130gr | Speer Hot-Cor. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,228 fps; across all powders the maximum-charge window runs from 1,286 fps to 2,228 fps. ADI AR 2207 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (396 MPa), the top charges use 45–89 %, leaving at least 11 % headroom. ADI AR 2207, Alliant Reloder-10x, Alliant Reloder-7 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 36, Accurate 1680, IMR 4227 rank at the top here: for .300 HAM'R with the .308 | 130gr | Speer Hot-Cor they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.